Crib videos offer clue to mysterious child deaths

This family photo shows Hayden Fell. He died in his sleep when he was 17 months old. [AP Photo]

The last bedtime of 17-month-old Hayden Fell's life was heartbreakingly normal. Crib video shows the toddler in pajamas playing happily as his parents and sister sang Wheels on the Bus with his twin brother.

The next morning, Hayden's dad couldn't wake him. The tot had become one of several hundred seemingly healthy U.S. toddlers and preschoolers each year who suddenly die in their sleep and autopsies can't tell why. But Hayden's crib cam was recording all night - and offered a clue.